In terms of setup and usability, the Mac Studio is a breeze, starting from the clever eco-friendly packaging to the soft whoosh of its fans. It’s a great upgrade if you work in an environment like mine. The Nano-texture glass gives up a little bit of the sharp vibrant look you get with a glossy screen, but it’s worth the trade in usability, to be able to see the screen without distractions all day long. I have a bunch of windows in my home office at various times of day, using a glossy screen can be a battle. After using the Studio Display for three weeks, I’d say it’s so good it really gets out of the way. I don’t tend to focus much on displays as long as they do a good job and get out of the way. As spec’d, this is a $7999 system with all the bells and whistles, but a more modest $3999 system would lead to the same performance conclusions in this review.Īpple also sent along a $2299 Studio Display with Nano-texture glass ($300) and tilt/height adjustable stand ($400). More on that in a bit.Īpple was kind enough to lend me a Mac Studio with 20-core M1 Ultra CPU (16 performance cores / 4 efficiency cores), 64-core GPU, 128GB unified memory, and an 8TB SSD. With the Mac Studio Ultra, the theme was direct and turned out to be technical after all: this 8x8x4" supercomputer is off the charts. So when I get to review new pro Macs, I always look for some sort of inspiration, some sort of creative hook that leads me to an interesting theme. ![]() It’s all about documenting facts and data in a direct manner, in tables and charts, without much emotion or creativity. © 2020 International Center for Artificial Organs and Transplantation and Wiley Periodicals, Inc.I do a lot of writing as an engineer, but it’s technical writing. This detailed computational framework with improved modeling techniques and an extensive validation procedure will be used in future CFD studies of centrifugal blood pumps to aid in device design and predictions of their biological responses.įood and Drug Administration centrifugal blood pump computational fluid dynamics hemolysis validation. These results suggest that the importance of accounting for blood's viscoelasticity may be dependent on the specific blood pump operating conditions. Small differences were observed between the Newtonian and viscoelastic blood models in pressure head and hemolysis at the higher flow rate cases (FDA Conditions 4 and 5) but were more significant at lower flow rate and pump impeller speeds (FDA Condition 1). While CFD radial velocity profiles between the impeller blades also compared well to the PIV velocity results, more work is still needed to address the large variability among both experimental and computational predictions of velocity in the diffuser outlet jet. The CFD simulations were able to match the FDA pressure and hemolysis data for multiple pump operating conditions, with the CFD results being within the standard deviations of the experimental results. The established computational framework, including a dynamic rotating mesh, animal blood-specific fluid properties and hemolysis modeling, and a k-ω SST turbulence model, was shown to more accurately predict pump pressure heads, velocity fields, and hemolysis compared to previously published CFD studies of the FDA centrifugal pump. ![]() ![]() A viscoelastic blood model was then incorporated into the CFD solver to investigate the importance of modeling blood's viscoelasticity in centrifugal pumps. A Newtonian blood model was first used to compare to the PIV data with a blood analog fluid while hemolysis data were compared using a power-law hemolysis model fit to porcine blood data. Therefore, the Food and Drug Administration (FDA) benchmark centrifugal blood pump and its database of experimental PIV and hemolysis data were used to thoroughly validate CFD simulations of the same blood pump. They must also account for and accurately model the specific working fluid in the pump, whether that is a blood-analog solution to match an experimental PIV study or animal blood in a hemolysis experiment. In order to simulate hemodynamics within centrifugal blood pumps and to predict pump hemolysis, CFD simulations must be thoroughly validated against experimental data.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |